Remove MetaDataHandle from top level README

Author: tmadlener

README.md

@@ -14,7 +14,6 @@ k4FWCore also provides the `k4run` script used to run Gaudi steering files. See
 | IOSvc | k4DataSvc | Service handling the PODIO types and collections |
 | Reader | PodioInput | Algorithm to read data from input files on disk. |
 | Writer | PodioOutput | Algorithm to write data to an output file on disk. |
-| MetadataSvc | MetaDataHandle | Service/Handle handling user defined metadata |
 
 See the [documentation](doc/PodioInputOutput.md) for more information.